http://qiserver.ugr.es/cod/1523654.cif
http://qiserver.ugr.es/cod/1523655.cif
http://qiserver.ugr.es/cod/1523656.cif
http://qiserver.ugr.es/cod/1524196.cif
http://qiserver.ugr.es/cod/1524197.cif
http://qiserver.ugr.es/cod/1538047.cif